The Super Speed Power Port & 12v Charger has two functions. First, by connecting the charger to an IcyBreeze battery and a 12 V power socket, you can charge your battery pack from a vehicle. The lights on the top of the charger indicate the charge status of the battery. The light closest to the snowflake logo will show red when charging and change to green when the battery is fully charged. The next lights will light up when charging to indicate how full the battery is. One light shows 30% charge, two lights shows 60% charge, and 3 lights shows 90% charge. The Super Speed Power Port & 12v Charger also has two USB ports that can be used to charge other portable devices. The USB slots will not charge the battery. The power cord that comes with the 12 V battery charger can also power the IcyBreeze directly.